Avoid investing money on projects where their main point and focus is on the profits you will make, they promise fake guarantee also a a safeguard method that will make you very rich..this is a big red flag
If all the team talks about is money that you will earn without any explanation how they will make that happen and also no technical professionals behind it it's a big red flag.
It is totally obvious, people must be dumb not knowing where did the money came from and still go for it. I once see a project like that and in the last moment they were just a mere ponzi scheme. They even paid great amounts of money promoting their site and in the end the ones who participated gets a negative trust. It was called bizillion. Despite the obviousness, people don't bother to investigate and the money is gone when they have tried to. Id rather focus of the development of the product than to invest in something like that.